code: def collection_name(self):
      return self.index.collection_name
  
file_path: milvus/tests/python_client/base/index_wrapper.py
imports: import sys
  from pymilvus import Index
  from check.func_check import ResponseChecker
  from utils.api_request import api_request
label_desc: Use image node_id 4 for calling the ApiIndexWrapper obj's underlying member method code with example usage: obj.collection_name() and returns: self